investigating officer submit the affidavits to the committee, Groaning’s alleged violation of the regulation did not affect Whitford’s ultimate conviction. Section 504.60(e) is a procedural regulation that governs the conduct of the investigating officer. If Whitford believed that the committee should consider the affidavits, he retained the right to submit them himself, which he did. Thus, Whitford cannot claim that the violation of § 504.60(e) prevented him from presenting a defense or otherwise caused him to be improperly convicted. Groaning’s actions did not cause Whitford to lose freedom from restraint or place a significant hardship on him. Thus, under Sandin, § 504.60(e) does not grant Whitford a federally enforceable liberty interest.
In addition, Whitford may not claim that Groaning’s failure to submit the affidavits was an independent violation of his federal due process rights. Whitford has no federal due process right to a prehearing investigation, see Smith v. Farley, 858 F.Supp. 806, 810 (N.D.Ind.1993), aff'd sub nom., Smith v. Parke, 56 F.3d 67 (7th Cir.1995) (table); United States ex rel. Wilson v. DeRobertis, 508 F.Supp. 360, 362 (N.D.Ill.1981), much less a right to have the investigating officer submit affidavits to the committee. Thus, Groaning’s failure to submit the affidavits to the committee did not violate Whitford’s federal due process rights.
IV. The Disciplinary Hearing
Whitford argues that his disciplinary hearing was not conducted in a manner consistent with due process. Before evaluating his individual claims, we will initially discuss whether, under Sandin, federal due process protections apply to Whitford’s disciplinary hearing.
The penalty suffered by Whitford as a result of his conviction was six months of segregation, six months of loss of good time credits (the credits were later earned back), and transfer to a maximum security institution.6 Sandin recognizes the possibility that a prisoner may possess a liberty interest in freedom from punishment that “will inevitably affect the duration of his sentence.” Sandin, — U.S. at --•, 115 S.Ct. at 2302. The loss of good time credits would affect the duration of Whitford’s sentence. However, he later earned them back, rendering any suit concerning the loss of good time credits moot.
Next, Whitford’s transfer to a maximum security institution did not implicate his federal due process rights. A prisoner has no due process right to be housed in any particular facility. Meachum v. Fano, 427 U.S. 215, 224, 96 S.Ct. 2532, 2538, 49 L.Ed.2d 451 (1976). “The initial decision to assign the convict to a particular institution is not subject to audit under the Due Process Clause, ... [because] [t]he conviction has sufficiently extinguished the defendant’s liberty interest to empower the state to confine him in any of its prisons.” Id. (emphasis in original). Similarly, a transfer to another prison, even to one with a more restrictive environment, is not a further deprivation of an inmate’s liberty under the Due Process Clause itself because the prisoner could have been initially placed in a more restrictive institution, so a transfer does not fall outside the expected scope of the sentence. Montanye v. Haymes, 427 U.S. 236, 242, 96 S.Ct. 2543, 2547, 49 L.Ed.2d 466 (1976); Meachum, 427 U.S. at 224-25, 96 S.Ct. at 2538-39; Ramirez v. Turner, 991 F.2d 351, 353 (7th Cir.1993); Miller v. Henman, 804 F.2d 421, 423 (7th Cir.1986), cert. denied, 484 U.S. 844, 108 S.Ct. 136, 98 L.Ed.2d 93 (1987).
In addition, the Meachum Court held that Massachusetts prison disciplinary regulations could not create a due process right to a pretransfer hearing, because prisoners may be transferred even without having been convicted of a disciplinary violation. Meachum, 427 U.S. at 226-27, 96 S.Ct. at 2539-40. Because a prisoner may be transferred regardless of whether he was convicted, he may not contest his transfer on the ground that his conviction violated due process. See id.; Montanye, 427 U.S. at 243, 96 S.Ct. at 2547-48 (New York law did not create right to pre-transfer hearing because
6
Whitford was also demoted to C grade for six months. Prisoners demoted to C grade "receive no privileges except yard and commissary.” 20 Ill.Admin.Code ch. 1 § 504.130(a)(3).